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Gossamer Deployment Systems for Flexible Photovoltaics

Grundmann, Jan Thimo and Spietz, Peter and Seefeldt, Patric and Spröwitz, Tom (2016) Gossamer Deployment Systems for Flexible Photovoltaics. In: Proceedings of the 67th International Astronautical Congress. 67th Internationa Astronautical Congress (IAC), 26-30 Sep 2016, Guadalajara, Mexico. ISBN 9781510835825

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Abstract

In recent years the German Aerospace Center (DLR) developed gossamer deployment systems in the GOSSAMER- 1 project with a focus on solar sails also equipped with small thin-film photovoltaic arrays. With our new project GOSOLAR ahead, the focus is now entirely on gossamer deployment systems for huge thin-film photovoltaic arrays. Based on the previous achievements in the field of deployment technology and qualification strategies, new technology for the integration of thin-film photovoltaics will be developed and qualified with the goal of a first inorbit technology demonstration. The time frame for this development is about five years. The two major objectives of the project are the further development of deployment technology for a 25 m² gossamer solar power generator and the development of a flexible photovoltaic membrane. In contrast to the GOSSAMER-1 deployment approach, GOSOLAR enables a wider range of deployment concepts. The technology demonstration is supposed to employ the S²TEP bus system which is developed on-site in parallel. While the development of a bus system is in consequence not part of the GOSOLAR project, there are special challenges when it comes to the development of huge solar arrays. The level of power required in the solar array application is about two orders of magnitude higher than for a sailcraft of the same size. The currents required to carry power off the thin-film structure at commonly used bus voltages result in a substantial harness cross-section. At the same time, there is a desire for higher voltages, e.g. to power electrical propulsion directly. In consequence the first system GOSOLAR will be a low voltage system employing offthe- shelf small spacecraft power system technology. The development of high power systems will be studied in parallel and its implementation is left to future projects. Using an established test strategy, a characterization of the deployment performance and deployment forces will be made based on a test-as-you-fly approach. It includes vibration testing, fast decompression, partial deployment under thermal-vacuum and full-scale ambient deployment on a test rig previously developed for GOSSAMER-1. The data gained can be used for further development and as input for mechanism and structure sizing. Examples for the application of those testing strategies are the previous DLR GOSSAMER-1 project, the ESA drag sail projects ‘Deployable Membrane’ and ‘Architectural Design and Testing of a De-Orbiting Subsystem’ (ADEO) as well as the tether deployment of the HP³ experiment on the NASA/JPL Mars mission INSIGHT.

Item URL in elib:https://elib.dlr.de/106398/
Document Type:Conference or Workshop Item (Speech)
Title:Gossamer Deployment Systems for Flexible Photovoltaics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Grundmann, Jan ThimoJan.Grundmann (at) dlr.dehttps://orcid.org/0000-0002-8809-0981
Spietz, PeterPeter.Spietz (at) dlr.deUNSPECIFIED
Seefeldt, PatricPatric.Seefeldt (at) dlr.deUNSPECIFIED
Spröwitz, TomTom.Sproewitz (at) dlr.dehttps://orcid.org/0000-0001-5369-6919
Date:2016
Journal or Publication Title:Proceedings of the 67th International Astronautical Congress
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
ISBN:9781510835825
Status:Published
Keywords:large-scale photovoltaics, thin-film photovoltaics, GoSolAr, S2TEP, Gossamer-1, solar sail
Event Title:67th Internationa Astronautical Congress (IAC)
Event Location:Guadalajara, Mexico
Event Type:international Conference
Event Dates:26-30 Sep 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Entfaltungstechnologie . Solar Sail (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems
Deposited By: Sznajder, Dr.-Ing. Maciej
Deposited On:05 Oct 2016 15:08
Last Modified:31 Jul 2019 20:03

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